test statistics
stat update
Revert "stat update"

This reverts commit 86810f62e99288d850301411fd25eff72b3b8116.
Revert "test statistics"

This reverts commit 13e56f234c6a762add23deef2a48c3ecfa145550.
about fix
Merge pull request #1 from hjujgfg/master

stable update